Testing

Question 1

Koans Testing

Answer 1

// Some ways of asserting equality are better than others.
  it("should assert equality a better way", function() { 
	  var expectedValue = 2;
	  var actualValue = 1 + 1;

  // toEqual() compares using common sense equality.
	  expect(actualValue).toEqual(expectedValue);
  });

Question 2

Array References - trouble spot

Answer 2

it("should know array references", function() {
    var array = [ "zero", "one", "two", "three", "four", "five" ];

    function passedByReference(refArray) {
      refArray[1] = "changed in function";
    }
    passedByReference(array);
    expect(array[1]).toBe("changed in function");

    var assignedArray = array;
    assignedArray[5] = "changed in assignedArray";
    expect(array[5]).toBe("changed in assignedArray");

    var copyOfArray = array.slice();
    copyOfArray[3] = "changed in copyOfArray";
    expect(array[3]).toBe("three");
  });